A general recommendation is 180 days but if it is a dried seasoning it will remain shelf stable for longer than that. Some seasonings will have a discernible change in scent. If you notice this throw it away.
For as long as the customer wants it to be kept open.
Actually I have kept my eyes open for about four minutes, but I had contacts in. With out contacts in I can only keep my eyes open for 45 seconds.
Two weeks
As long as there is no seasonings
i kept the windows open whole night.
Yes, you can take seasonings on a plane in your carry-on luggage as long as they are in containers that are 3.4 ounces or less and placed in a clear, quart-sized plastic bag.
rings of cartilage
Many many airports around the world were kept open during 9/11.
It is suggested not to leave it on over night, but it can be kept on for as long as you want.
Seasons
Sonic Seasonings was created in 1972.
Not exactly sure, I've never kept it after an hour. Plumbs drug formulary says 6hrs though.